/Engine/Plugins/Runtime/RigVM/Source/RigVM/Public/RigVMCore/RigVMRegistry.h
Adds a type if it doesn't exist yet and returns its index. This function is not thead-safe
[TRigVMTypeIndex](API\Plugins\RigVM\RigVMCore\TRigVMTypeIndex) FindOrAddType ( const [FRigVMTemplateArgumentType](API\Plugins\RigVM\RigVMCore\FRigVMTemplateArgumentType) & InType )